Test B: The Horn Is Always On

PINPOINT TEST B: THE HORN IS ALWAYS ON

B1-B3:

B3-B5:

B6:

Normal Operation
The battery junction box (BJB) supplies the switched and control voltage to the horn relay (part of the smart junction box [SJB]) through circuit SBB02 (YE/RD). When the horn switch (part of the steering wheel) is pressed, the switch closes and ground is applied from the steering wheel switch harness through the clockspring to the horn relay through circuit CRH02 (BU/WH). The horn relay is then energized, applying voltage to the horn through circuit CBP14 (VT/OG), enabling the horn to sound.

Possible Causes
- circuit CBP14 (VT/OG) short to voltage
- circuit CRH02 (BU/WH) short to ground
- steering wheel switch harness
- clockspring
- horn switch (part of the steering wheel)
- SJB